<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        function Vue(options){
            // console.log(options)
        }
        Vue.prototype.msg = 'hello';
        Vue.prototype.sayHello = function(){
            console.log(123);
        }
        Vue.prototype.$bus = new Vue();
        let vm = new Vue({
            el:"#app",
            data:{

            }
        })
        // vm.msg => 没有
        // Vue.prototype.msg
        console.log(vm.msg);
        vm.sayHello();

    </script>
</body>
</html>